A small insect starts walking away from a concave spherical mirror along its central axis. Which statement is true? O The image is initially upright, then flips upside down O The image is initially upright, and remains upright O The image in initially inverted, and remains inverted O None of these O The image is initially inverted, then flips upright

7) Solve this question, no handwritten, only typing

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Problem 4: Speed deamplifier. In the figure above on the right, block 1 of mass m1 slides along an x-axis on a frictionless floor at speed 4 m/sec.Then it undergoes a one-dimensional elastic collision with stationary block 2 of mass m2 = 2m1. Next, block 2 undergoes a one-dimensional elastic collision with stationary block 3 of mass mz = 4m1. What then is the speed of block 3? Answer: 16 m/sec or 1.78 m/sec.